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Introduction Antenna design and RF layout are critical in a wireless system . The wireless range that an end-customer gets out of an RF product with a current-limited power source such as a coin-cell battery depends greatly on the antenna design, the enclosure, and a good PCB layout. It is not uncommon to have a wide variation in RF ranges for designs that use the same silicon and the same power but a different layout and antenna-design practice. Other important general layout considerations for RF trace, power supply decoupling, via holes, PCB stackup, and antenna and grounding . An ante